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2. All lenses are calibrated; don't try to dismantle them apart by yourself.
3. Nosepiece and focusing system is advanced and precise in construction, and don't try to dismantle them apart by yourself. Please connect with an authorized technician when they are in trouble.
4. Keep the mechanical parts from dust, and add no corrosiveness lubricating grease into the sliding sections at regular intervals. Keep the optical elements clean when wipe the instrument.
5. Keep the instrument in dry and cool place. Disconnect it with the power source and put the dust cover over it after use.
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